Method for displaying movable target trajectory in three-dimensional scene

Abstract

The invention provides a method for displaying a movable target trajectory in a three-dimensional scene. Latitude and longitude data of a trajectory point of a movable target are generated; a frame-interpolation-based discrete data smoothing and spatial coordinate vector transformation method is adopted, such that a curve trajectory, which is continuous and steady in position and flexible in gesture transformation, is formed; a real-time calculation expansion proportion calculation method is adopted, such that the same pixel width is displayed when the distances between the target trajectory and an observer are different; simultaneously, a front and reverse colour value comparison method is adopted; different colour values of front and reverse surfaces are obtained through freedom change, such as heading, pitching and rolling; and thus, the flexible effect of a ribbon-like trajectory is realistically realized. According to the invention, the blanking phenomenon of a three-dimensional curve of the movable target trajectory in different observation distances in the three-dimensional scene can be solved; and the continuous, steady and smooth ribbon-like trajectory display effect of the trajectory point generated by the movable target can be realized.

Description

technical field [0001] The invention belongs to the technical field of computer three-dimensional situation display, and in particular relates to a display method for a moving target track in a three-dimensional scene. Background technique [0002] In various simulation and application information systems, through real-time access to geospatial data such as remote sensing / reconnaissance images, digital elevation models, and vector topographic maps, it can be tailored in the spatial range and fused into raster image data of the region to build a realistic 3D scenes; through the detection and processing of sensors such as radar and electronic reconnaissance, the moving targets such as aircraft flying in the air, ships sailing on the sea, and vehicles moving on land are displayed in the 3D scene; The continuous display of the positions of each discrete point is one of the important means to represent the movement process of the target object. [0003] Usually, in a 3D scene, t...

AI Technical Summary

Problems solved by technology

The problem with this method is that the pixel width of the curve track is not easy to control. Due to the characteristics of the three-dimensional perspective projection space, it is necessary to convert the position in the space coordinate system according to the pixel width value. Otherwise, when the distance between the target and the observer is long It will make the target invisible, and in order to maintain the consistency of the pixel width, it is necessary to calculate the position of the expansion point and rebuild the vertex structure in real time during the running process, so it takes a lot of CPU resources

This type of method only avoids the problem from a limited perspective. The pixel width of the calculated moving target trajectory will produce a jump in size when switching between different display scales. Distortion occurs. At the same time, this method requires a large amount of CPU for real-time calculations, and the screen is prone to pauses, resulting in poor performance.

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